| /* ----------------------------------------------------------------------- |
| raw_api.c - Copyright (c) 1999 Red Hat, Inc. |
| |
| Author: Kresten Krab Thorup <krab@gnu.org> |
| |
| $Id $ |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| ``Software''), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| OTHER DEALINGS IN THE SOFTWARE. |
| ----------------------------------------------------------------------- */ |
| |
| /* This file defines generic functions for use with the raw api. */ |
| |
| #include <ffi.h> |
| #include <ffi_common.h> |
| |
| #if !FFI_NO_RAW_API |
| |
| size_t |
| ffi_raw_size (ffi_cif *cif) |
| { |
| size_t result = 0; |
| int i; |
| |
| ffi_type **at = cif->arg_types; |
| |
| for (i = cif->nargs-1; i >= 0; i--, at++) |
| { |
| #if !FFI_NO_STRUCTS |
| if ((*at)->type == FFI_TYPE_STRUCT) |
| result += ALIGN (sizeof (void*), FFI_SIZEOF_ARG); |
| else |
| #endif |
| result += ALIGN ((*at)->size, FFI_SIZEOF_ARG); |
| } |
| |
| return result; |
| } |
| |
| |
| void |
| ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args) |
| { |
| unsigned i; |
| ffi_type **tp = cif->arg_types; |
| |
| #if WORDS_BIGENDIAN |
| |
| for (i = 0; i < cif->nargs; i++, tp++, args++) |
| { |
| switch ((*tp)->type) |
| { |
| case FFI_TYPE_UINT8: |
| case FFI_TYPE_SINT8: |
| *args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 1); |
| break; |
| |
| case FFI_TYPE_UINT16: |
| case FFI_TYPE_SINT16: |
| *args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 2); |
| break; |
| |
| #if FFI_SIZEOF_ARG >= 4 |
| case FFI_TYPE_UINT32: |
| case FFI_TYPE_SINT32: |
| *args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 4); |
| break; |
| #endif |
| |
| #if !FFI_NO_STRUCTS |
| case FFI_TYPE_STRUCT: |
| *args = (raw++)->ptr; |
| break; |
| #endif |
| |
| case FFI_TYPE_POINTER: |
| *args = (void*) &(raw++)->ptr; |
| break; |
| |
| default: |
| *args = raw; |
| raw += ALIGN ((*tp)->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG; |
| } |
| } |
| |
| #else /* WORDS_BIGENDIAN */ |
| |
| #if !PDP |
| |
| /* then assume little endian */ |
| for (i = 0; i < cif->nargs; i++, tp++, args++) |
| { |
| #if !FFI_NO_STRUCTS |
| if ((*tp)->type == FFI_TYPE_STRUCT) |
| { |
| *args = (raw++)->ptr; |
| } |
| else |
| #endif |
| { |
| *args = (void*) raw; |
| raw += ALIGN ((*tp)->size, sizeof (void*)) / sizeof (void*); |
| } |
| } |
| |
| #else |
| #error "pdp endian not supported" |
| #endif /* ! PDP */ |
| |
| #endif /* WORDS_BIGENDIAN */ |
| } |
| |
| void |
| ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw) |
| { |
| unsigned i; |
| ffi_type **tp = cif->arg_types; |
| |
| for (i = 0; i < cif->nargs; i++, tp++, args++) |
| { |
| switch ((*tp)->type) |
| { |
| case FFI_TYPE_UINT8: |
| (raw++)->uint = *(UINT8*) (*args); |
| break; |
| |
| case FFI_TYPE_SINT8: |
| (raw++)->sint = *(SINT8*) (*args); |
| break; |
| |
| case FFI_TYPE_UINT16: |
| (raw++)->uint = *(UINT16*) (*args); |
| break; |
| |
| case FFI_TYPE_SINT16: |
| (raw++)->sint = *(SINT16*) (*args); |
| break; |
| |
| #if FFI_SIZEOF_ARG >= 4 |
| case FFI_TYPE_UINT32: |
| (raw++)->uint = *(UINT32*) (*args); |
| break; |
| |
| case FFI_TYPE_SINT32: |
| (raw++)->sint = *(SINT32*) (*args); |
| break; |
| #endif |
| |
| #if !FFI_NO_STRUCTS |
| case FFI_TYPE_STRUCT: |
| (raw++)->ptr = *args; |
| break; |
| #endif |
| |
| case FFI_TYPE_POINTER: |
| (raw++)->ptr = **(void***) args; |
| break; |
| |
| default: |
| memcpy ((void*) raw->data, (void*)*args, (*tp)->size); |
| raw += ALIGN ((*tp)->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG; |
| } |
| } |
| } |
| |
| #if !FFI_NATIVE_RAW_API |
| |
| |
| /* This is a generic definition of ffi_raw_call, to be used if the |
| * native system does not provide a machine-specific implementation. |
| * Having this, allows code to be written for the raw API, without |
| * the need for system-specific code to handle input in that format; |
| * these following couple of functions will handle the translation forth |
| * and back automatically. */ |
| |
| void ffi_raw_call (ffi_cif *cif, void (*fn)(), void *rvalue, ffi_raw *raw) |
| { |
| void **avalue = (void**) alloca (cif->nargs * sizeof (void*)); |
| ffi_raw_to_ptrarray (cif, raw, avalue); |
| ffi_call (cif, fn, rvalue, avalue); |
| } |
| |
| #if FFI_CLOSURES /* base system provides closures */ |
| |
| static void |
| ffi_translate_args (ffi_cif *cif, void *rvalue, |
| void **avalue, void *user_data) |
| { |
| ffi_raw *raw = (ffi_raw*)alloca (ffi_raw_size (cif)); |
| ffi_raw_closure *cl = (ffi_raw_closure*)user_data; |
| |
| ffi_ptrarray_to_raw (cif, avalue, raw); |
| (*cl->fun) (cif, rvalue, raw, cl->user_data); |
| } |
| |
| ffi_status |
| ffi_prep_raw_closure_loc (ffi_raw_closure* cl, |
| ffi_cif *cif, |
| void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
| void *user_data, |
| void *codeloc) |
| { |
| ffi_status status; |
| |
| status = ffi_prep_closure_loc ((ffi_closure*) cl, |
| cif, |
| &ffi_translate_args, |
| codeloc, |
| codeloc); |
| if (status == FFI_OK) |
| { |
| cl->fun = fun; |
| cl->user_data = user_data; |
| } |
| |
| return status; |
| } |
| |
| #endif /* FFI_CLOSURES */ |
| #endif /* !FFI_NATIVE_RAW_API */ |
| |
| #if FFI_CLOSURES |
| |
| /* Again, here is the generic version of ffi_prep_raw_closure, which |
| * will install an intermediate "hub" for translation of arguments from |
| * the pointer-array format, to the raw format */ |
| |
| ffi_status |
| ffi_prep_raw_closure (ffi_raw_closure* cl, |
| ffi_cif *cif, |
| void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
| void *user_data) |
| { |
| return ffi_prep_raw_closure_loc (cl, cif, fun, user_data, cl); |
| } |
| |
| #endif /* FFI_CLOSURES */ |
| |
| #endif /* !FFI_NO_RAW_API */ |